Fix subnode lifecycle (do not free). Always return NULL if node not found.
Fix subnode lifecycle (do not free).
Always return NULL if node not found.

Tatsh/libplist,libimobiledevice/libplist,libimobiledevice/libplist,Tatsh/libplist,libimobiledevice-win32/libplist,libimobiledevice-win32/libplist,Tatsh/libplist,Tatsh/libplist,libimobiledevice-win32/libplist,libimobiledevice-win32/libplist,libimobiledevice/libplist